SMA Sunny Island 4248U, Инструкция по установке и эксплуатации

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Commissioning SI4248U Manual
46
• GridFeedPV
If excess power generated by the grid interactive inverters such as Sunny Boys is to be fed
to the grid, setting the GridConnected parameter to GridFeedPV will allow the power to be
fed to the grid via the grid-isolation relay in the Sunny Island. Remember, the Sunny Island
will not supply power to the grid from its batteries.
NOTE: To protect the grid-isolation relay in the Sunny Island 4248U from
overload, the maximum power that can be fed to grid is limited to 6.72 kW,
or 56 A at 120 V AC per Sunny Island. To prevent interruptions in the
operation of your system, the total power of the PV array for the grid
interactive inverters should not exceed this value. If this value is exceeded for
longer than 30 seconds, the Sunny Island 4248U will switch to island mode
immediately.
• GridCharge
When the "GridConnected" parameter is set to "GridCharge", the Sunny Island 4248U will
not allow power to be passed through its grid-isolation relay and into the grid. If for any
reason it detects power being fed to the grid, it will trigger an error and immediately switch
to island mode.
AC Output Voltage Verification
Once the system parameters are set, the inverter is ready to begin operating. The AC output
must be tested to make sure that it is within specifications.
Switch the inverter on and then, using an AC incandescent lamp as a load, measure the output
voltage of the inverter to verify that the AC voltage is approximately 120 V AC.
Well Done! The Sunny Island 4248U is now ready to operate normally (If perchance the
inverter is not running at this point, refer to the Troubleshooting guide and correct the error
indicated by the code on the display).